CN103387271B - A heat integrated device for ammonia distillation and desulfurization by using chemical products - Google Patents
A heat integrated device for ammonia distillation and desulfurization by using chemical products Download PDFInfo
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- CN103387271B CN103387271B CN201310298671.6A CN201310298671A CN103387271B CN 103387271 B CN103387271 B CN 103387271B CN 201310298671 A CN201310298671 A CN 201310298671A CN 103387271 B CN103387271 B CN 103387271B
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- Prior art keywords
- ammonia
- tower
- reboiler
- wastewater
- heat
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- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 title claims abstract description 202
- 229910021529 ammonia Inorganic materials 0.000 title claims abstract description 101
- 238000006477 desulfuration reaction Methods 0.000 title claims abstract description 22
- 230000023556 desulfurization Effects 0.000 title claims abstract description 20
- 238000004821 distillation Methods 0.000 title abstract 10
- 239000000126 substance Substances 0.000 title description 3
- 238000000034 method Methods 0.000 claims abstract description 39
- 238000003795 desorption Methods 0.000 claims abstract description 36
- 239000002351 wastewater Substances 0.000 claims abstract description 34
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 18
- 230000010354 integration Effects 0.000 claims abstract description 8
- 235000011114 ammonium hydroxide Nutrition 0.000 claims description 4
- 238000001816 cooling Methods 0.000 claims description 3
- 238000000605 extraction Methods 0.000 claims description 2
- 239000007791 liquid phase Substances 0.000 claims description 2
- 239000012071 phase Substances 0.000 claims description 2
- 239000007921 spray Substances 0.000 claims description 2
- 238000004939 coking Methods 0.000 abstract description 6
- 238000005516 engineering process Methods 0.000 description 6
- 238000010438 heat treatment Methods 0.000 description 5
- 239000000498 cooling water Substances 0.000 description 4
- 210000000689 upper leg Anatomy 0.000 description 4
- 238000009833 condensation Methods 0.000 description 3
- 230000005494 condensation Effects 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 239000002826 coolant Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000002309 gasification Methods 0.000 description 2
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000003034 coal gas Substances 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Landscapes
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
- Heat Treatment Of Water, Waste Water Or Sewage (AREA)
Abstract
The present invention discloses a heat integrated device which can be wildly used between an ammonia distillation process and a desulfurization process in coking industry. The device comprises a steam reboiler, a H2S desorption tower, an ammonia distillation tower, an ammonia distillation wastewater reboiler, and an ammonia dephlegmator. The bottom of the H2S desorption tower is connected to the dephlegmator at the top of the ammonia distillation tower, the bottom of the H2S desorption tower is connected to the ammonia distillation wastewater reboiler, a desulfuration barren solution at the bottom of the H2S desorption tower is heated by using an ammonia distillation wastewater heater and the dephlegmator at the top of the ammonia distillation tower, and the low temperature exhaust heat of the ammonia distillation wastewater and the latent heat of water vapor in the ammonia distillation tower are recovered. According to the invention, via heat integration among different units, gradient utilization of energy is achieved, reducing the quantity of shared works, water consumption of the whole plant, and operating costs.
Description
Technical field
The invention provides a kind of heat recovery method that is widely used in coking industry, relate to one for hot integrated technology between ammonia still process and desulfurizer, is exactly specifically to utilize ammonia still waste heat as H
2s desorption tower thermal source.
Background technology
In recovery of chemical products process, ammonia still process process adopts the ammonia still process of water vapor air lift more, and rich ammoniacal liquor is discharged by tower top after air lift desorb, and distilled ammonia wastewater is discharged at the bottom of by tower.Ammonia still process column bottom temperature is conventionally 105-108 DEG C of left and right, distilled ammonia wastewater first with wash ammonia after rich ammoniacal liquor carry out heat exchange, after heat exchange, the temperature of distilled ammonia wastewater is down to 78-85 DEG C, then through water cooler and recirculated cooling water heat exchange to normal temperature, send biochemical treatment.Ammonia still process tower top temperature is 100-102 DEG C, after ammonia dephlegmator partial condensation, ammonia temperature is 85-90 DEG C, dephlegmator effect is by the water section condensation in tower top ammonia, and obtaining ammonia quantity is 35-45%(volume fraction) ammonia, in dephlegmator, use recirculated cooling water as cold medium.
H
2s desorption tower moves under vacuum condition, and working pressure is 18kPa(absolute pressure), the water vapour counter current contact rising at the bottom of rich solution and desorption tower desorbs sour gas from rich solution.Column bottom temperature is 55-60 DEG C, and tower bottom reboiler adopts the steam heating of 0.5MPa.
In above-mentioned heat transfer process, the cold logistics of part is by steam heating, and the hot logistics of part, by water quench, is not mated heat exchange well between hot and cold logistics, do not consider the integrated utilization of energy, causes general facilities waste, is unfavorable for the energy-saving and emission-reduction of coking industry.
A kind of technique of carrying out ammonia still process with tube furnace cyclic heating wastewater has been developed in Zhongye Coke Resistance Engineering Technology Co., Ltd's application in 2008, uses indirect steam to substitute open steam air lift, reduces water consumption, reduces distilled ammonia wastewater.This patent No. is: CN200810229586.3.
A kind of coal gas primary cooler of realizing raw gas and doctor solution heat exchange has been developed in ACRE Coking & Refractory's application in 2011, and this primary cooler uses raw gas and doctor solution heat exchange, has saved H
2heating steam at the bottom of S desorption tower.This patent No. is: CN201120009987.5.
Above-mentioned patent is mainly carried out reducing energy consumption to single tower, does not relate between tower hot integrated.
Summary of the invention
For above-mentioned situation, the invention provides a kind of heat integration device for ammonia still process and desulfurization, to realize low temperature exhaust heat and steam latent heat recovery.Utilize the analysis of folder point matching technique, find ammonia still and H
2there is hot integrated chance in S desorption tower.By thermal source and hot trap rational Match, water vapour latent heat in recyclable distilled ammonia wastewater low temperature exhaust heat, ammonia still, reclaims heat and substitutes H for part
2general facilities heating steam at the bottom of S desorption tower, thus reach energy-saving and cost-reducing object.
For achieving the above object, the method for the invention is solved by following technical scheme:
A kind ofization produced the heat integration device of ammonia still process and desulfurization, comprises steam reboiler, H
2s desorption tower, ammonia still, distilled ammonia wastewater reboiler and ammonia dephlegmator.By H
2at the bottom of S desorption tower, be connected with distilled ammonia wastewater reboiler shell side, desulfurization lean solution is after the heat exchange of distilled ammonia wastewater reboiler, and gas phase part is returned to H by the road
2s desorption tower, liquid phase part as tower at the bottom of extraction; To be connected with distilled ammonia wastewater reboiler tube side with the distilled ammonia wastewater after rich ammoniacal liquor heat exchange, distilled ammonia wastewater removes circulating cooling water-to-water heat exchanger after the heat exchange of distilled ammonia wastewater reboiler.By H
2at the bottom of S desorption tower tower, be connected with ammonia still process tower top ammonia dephlegmator shell side, after desulfurization lean solution and the heat exchange of ammonia still process tower top ammonia, return to H
2s desorption tower; The tower top ammonia dephlegmator tube side of ammonia still is ammonia, ammonia deammoniation decomposing furnace or spray saturex after heat exchange.
The present invention is at H
2at the bottom of S desorption tower, set up a distilled ammonia wastewater reboiler, this reboiler and original steam reboiler are parallel to be arranged, distilled ammonia wastewater reboiler hot-fluid thigh from recirculated water cooling before distilled ammonia wastewater, cold flow thigh is taken from H
2desulfurization lean solution at the bottom of S desorption tower.
It is by H
2at the bottom of S desorption tower, be connected with ammonia still process tower top dephlegmator shell side, ammonia still process tower top dephlegmator cold flow thigh changes desulfurization lean solution into by former water coolant, and dephlegmator hot-fluid thigh is still tower top ammonia.
The invention has the beneficial effects as follows:
(1) integrated by heat between ammonia still process, desulfurizer, reclaim water vapour latent heat in ammonia still, can be by H
2at the bottom of S desorption tower, steam consumption reduces 1/3-1/2.
(2) integrated by heat between ammonia still process, desulfurizer, reclaim distilled ammonia wastewater low temperature exhaust heat, reduce gaseous effluent cooler thermal load, can save recirculated cooling water approximately 40%.
(3) integrated by heat between ammonia still process, desulfurizer, can save ammonia still process tower top dephlegmator water coolant, thereby reduce full factory water consumption, and then reduce the power consumption that treatment of cooling water is brought.
(4) the present invention is less to equipment, pipeline change, only increases/arrange an interchanger, just realizes quality, heat are synchronously optimized.This technology is applicable to all coal chemical enterprises, has a extensive future.
Brief description of the drawings
Being of accompanying drawing produced the schematic diagram of ammonia still process and desulfurization heat integration device.
In figure: 1 steam reboiler; 2H
2s desorption tower; 3 distilled ammonia wastewater reboilers; 4 ammonia stills; 5 ammonia dephlegmators.
Embodiment
Combination technology scheme and accompanying drawing describe the specific embodiment of the present invention in detail.
Embodiment 1
As shown in drawings, at H
2at the bottom of S desorption tower, set up a distilled ammonia wastewater reboiler, this reboiler shell side is connected with at the bottom of desorption tower, and this reboiler tube side is connected with distilled ammonia wastewater after heat exchange.Under nominal situation, at the bottom of desorption tower, desulfurization lean solution temperature is 55-60 DEG C, and distilled ammonia wastewater temperature is 78-85 DEG C, desulfurization lean solution partial gasification after waste water heater heat exchange, and distilled ammonia wastewater temperature is down to 60-65 DEG C.
For existing flow process, ammonia still process tower top dephlegmator is carried out to pipeline transformation, make itself and H
2at the bottom of S desorption tower be connected, with pump by H
2at the bottom of S desorption tower, desulfurization lean solution is delivered to ammonia still process tower top dephlegmator shell side, after the heat exchange of ammonia still process tower top ammonia, and under the effect of pressure difference, the desulfurization lean solution auto-returned H after heat exchange
2s desorption tower.For newly-built flow process, ammonia still process tower top dephlegmator shell side pipeline is directly connected into H
2s desorption tower.Under nominal situation, at the bottom of desorption tower, desulfurization lean solution temperature is 55-60 DEG C, ammonia still process tower top ammonia temperature 100-105 DEG C, and after dephlegmator heat exchange, water section condensation in ammonia still process tower top ammonia, ammonia temperature is down to 85-90 DEG C, desulfurization lean solution partial gasification.
For existing flow process, retain H
2s desorb bottom steam reboiler, because ammonia still process tower top dephlegmator, distilled ammonia wastewater reboiler have been shared this reboiler 1/3-1/2 heat, so reboiler steam amount at the bottom of desorption tower is reduced to the 1/3-1/2 of original steam amount.For newly-built flow process, can reduce steam reboiler size.
The invention provides a kind of for changing the heat integration device that produces ammonia still process and desulfurization, by the rational Match of thermal source, hot trap, reduce energy consumption in coking production process, water consumption, be coking industry energy-conserving and emission-cutting technology, there is higher economic benefit and social benefit, have a extensive future.Except the technical characterictic described in specification sheets, be the known technology of those skilled in the art.
Claims (1)
1. change a heat integration device that produces ammonia still process and desulfurization, it is characterized in that, this heat integration device comprises steam reboiler, H
2s desorption tower, ammonia still, distilled ammonia wastewater reboiler and ammonia dephlegmator; Steam reboiler and H
2at the bottom of S desorption tower tower, be connected, desulfurization lean solution is returned to H after entering steam reboiler and steam heat-exchanging
2s desorption tower; H
2at the bottom of S desorption tower tower, be connected with distilled ammonia wastewater reboiler shell side, desulfurization lean solution after the heat exchange of distilled ammonia wastewater reboiler, gas phase part by the road with H
2at the bottom of S desorption tower tower be connected, liquid phase part as tower at the bottom of extraction; By being connected with distilled ammonia wastewater reboiler tube side with the distilled ammonia wastewater after rich ammoniacal liquor heat exchange, after distilled ammonia wastewater heat exchange, remove circulating cooling water-to-water heat exchanger; H
2at the bottom of S desorption tower tower, be connected with ammonia still tower top ammonia dephlegmator shell side, after desulfurization lean solution and the heat exchange of ammonia still tower top ammonia, return to H
2s desorption tower; The tower top ammonia dephlegmator tube side of ammonia still is ammonia, ammonia deammoniation decomposing furnace or spray saturex after heat exchange.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310298671.6A CN103387271B (en) | 2013-07-16 | 2013-07-16 | A heat integrated device for ammonia distillation and desulfurization by using chemical products |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310298671.6A CN103387271B (en) | 2013-07-16 | 2013-07-16 | A heat integrated device for ammonia distillation and desulfurization by using chemical products |
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| Publication Number | Publication Date |
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| CN103387271A CN103387271A (en) | 2013-11-13 |
| CN103387271B true CN103387271B (en) | 2014-07-23 |
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| CN104083885B (en) * | 2014-07-11 | 2015-11-11 | 成都华西堂投资有限公司 | The heat pump distillation new energy-saving process of desulfurization solvent in renewable flue gas desulfurization |
Citations (7)
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|---|---|---|---|---|
| JP2004115561A (en) * | 2002-09-24 | 2004-04-15 | Jfe Chemical Corp | Method for operating desulfurizer of coke oven gas |
| CN101475235A (en) * | 2008-12-11 | 2009-07-08 | 中冶焦耐工程技术有限公司 | Process for ammonia distillation by cyclic heating wastewater using tube furnace |
| CN101708414A (en) * | 2009-12-31 | 2010-05-19 | 攀钢集团研究院有限公司 | System and method for desulphurizing waste gas by cyclic absorption and application thereof |
| WO2010057597A3 (en) * | 2008-11-20 | 2011-03-24 | Lurgi Gmbh | Method and plant for obtaining nh3 from a mixture comprising nh3 and acidic gases |
| CN102730720A (en) * | 2011-04-14 | 2012-10-17 | 重庆紫光化工股份有限公司 | Method and system for recovering ammonia from gas containing hydrocyanic acid |
| CN102807259A (en) * | 2012-08-03 | 2012-12-05 | 济钢集团有限公司 | Heat pump distillation system of residual ammonia water |
| CN203461846U (en) * | 2013-07-16 | 2014-03-05 | 大连理工大学 | Heat integration device for ammonia distillation and desulfurization in chemical production |
-
2013
- 2013-07-16 CN CN201310298671.6A patent/CN103387271B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004115561A (en) * | 2002-09-24 | 2004-04-15 | Jfe Chemical Corp | Method for operating desulfurizer of coke oven gas |
| WO2010057597A3 (en) * | 2008-11-20 | 2011-03-24 | Lurgi Gmbh | Method and plant for obtaining nh3 from a mixture comprising nh3 and acidic gases |
| CN101475235A (en) * | 2008-12-11 | 2009-07-08 | 中冶焦耐工程技术有限公司 | Process for ammonia distillation by cyclic heating wastewater using tube furnace |
| CN101708414A (en) * | 2009-12-31 | 2010-05-19 | 攀钢集团研究院有限公司 | System and method for desulphurizing waste gas by cyclic absorption and application thereof |
| CN102730720A (en) * | 2011-04-14 | 2012-10-17 | 重庆紫光化工股份有限公司 | Method and system for recovering ammonia from gas containing hydrocyanic acid |
| CN102807259A (en) * | 2012-08-03 | 2012-12-05 | 济钢集团有限公司 | Heat pump distillation system of residual ammonia water |
| CN203461846U (en) * | 2013-07-16 | 2014-03-05 | 大连理工大学 | Heat integration device for ammonia distillation and desulfurization in chemical production |
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| CN103387271A (en) | 2013-11-13 |
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